Comment 18 for bug 141435

try 'blkid' command to find out UUID
use 'tune2fs' for ext3 filesystem, 'reiserfstune' for reiserfs filesystem, and 'xfs_admin' for xfs filesystem

my sample looks like:
$ blkid
/dev/sda1: UUID="546ea841-093b-42ea-964a-3c2e5ff3a2f3" TYPE="swap"
/dev/sda2: UUID="df8eb64d-41d3-4fa6-88b2-5d8163fe4dbe" TYPE="reiserfs"
/dev/sda3: UUID="546ea841-093b-42ea-964a-3c2e5ff3a203" TYPE="xfs"
/dev/sdb1: UUID="546ea841-093b-42ea-964a-3c2e5ff3a2f3" TYPE="swap"
/dev/sdb2: UUID="df8eb64d-41d3-4fa6-88b2-5d8163fe4dbe" TYPE="reiserfs"
/dev/sdb3: UUID="546ea841-093b-42ea-964a-3c2e5ff3a203" TYPE="xfs"
/dev/hdb1: UUID="7833498a-96aa-43fe-86e9-68647bbfe359" TYPE="swap"
/dev/hdb2: UUID="66803B6F803B4539" LABEL="CONTENT" TYPE="ntfs"

you can see e.g. there is dublicated UUIDs of /dev/sda2 and /dev/sdb2 (my root partition dmraid devices in raid1)

i have just use: (e.g.)

$sudo xfs_admin -U 546ea841-093b-42ea-964a-000000000000 /dev/sda1
$sudo reiserfstune -u df8eb64d-41d3-4fa6-88b2-000000000000 /dev/sda2

after that my UUID is not dublicate anymore
and then dmraid -ay works!! my /dev/mapper/nvidia_blahblah appears fine!

/dev/mapper/nvidia_blahblah2: UUID="df8eb64d-41d3-4fa6-88b2-000000000000" TYPE="reiserfs"
/dev/mapper/nvidia_blahblah1: UUID="546ea841-093b-42ea-964a-3c2e5ff3a2f3" TYPE="swap"
/dev/mapper/nvidia_blahblah3: UUID="546ea841-093b-42ea-964a-000000000000" TYPE="xfs"